Shelf for a wall system



FIG. 1 is a perspective view of a shelf for a wall system showing my new design, the two pole-like supports being shown in broken lines for illustrative purposes only;

FIG. 2 is a right side view of the shelf of FIG. 1, the left side view being essentially identical;

FIG. 3 is a front view of the shelf of FIG. 1;

FIG. 4 is a plan view of the shelf of FIG. 1; and

FIG. 5 is a bottom view of the shelf of FIG. 1.

The dotted lines show the environment of the shelf and are not considered part of the claim. 

The ornamental design for a shelf for a wall system, substantially as shown and described. 